chr5-128289213-T-C

Variant names:

• chr5-128289213-T-C
• rs149071226
• NM_001999.4:c.6551A>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001999.4(FBN2):​c.6551A>G​(p.Asn2184Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,536 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: FBN2 NM_001999.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.33

Genes affected

FBN2 (HGNC:3604): (fibrillin 2) The protein encoded by this gene is a component of connective tissue microfibrils and may be involved in elastic fiber assembly. Mutations in this gene cause congenital contractural arachnodactyly. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FBN2	NM_001999.4	c.6551A>G	p.Asn2184Ser	missense_variant	Exon 52 of 65	ENST00000262464.9	NP_001990.2
FBN2	XM_017009228.3	c.6398A>G	p.Asn2133Ser	missense_variant	Exon 51 of 64		XP_016864717.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FBN2	ENST00000262464.9	c.6551A>G	p.Asn2184Ser	missense_variant	Exon 52 of 65	1	NM_001999.4	ENSP00000262464.4
FBN2	ENST00000703783.1	n.3335A>G		non_coding_transcript_exon_variant	Exon 27 of 38
FBN2	ENST00000703785.1	n.3254A>G		non_coding_transcript_exon_variant	Exon 26 of 27

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250842 Hom.: 0 AF XY: 0.00000737 AC XY: 1 AN XY: 135608

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000883

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461536 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727078

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Uncertain	0.029	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.79	D;.;D
Eigen	Benign	0.14
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.89	D;.;.
M_CAP	Benign	0.056	D
MetaRNN	Uncertain	0.54	D;D;D
MetaSVM	Uncertain	0.33	D
MutationAssessor	Uncertain	2.3	M;.;M
PrimateAI	Uncertain	0.59	T
PROVEAN	Uncertain	-3.1	D;.;D
REVEL	Uncertain	0.51
Sift	Benign	0.054	T;.;T
Polyphen		0.099	B;.;B
Vest4		0.27
MutPred		0.75		Gain of disorder (P = 0.0705);.;Gain of disorder (P = 0.0705);
MVP		0.71
MPC		0.23
ClinPred		0.57	D
GERP RS		5.8
Varity_R		0.26
gMVP		0.37

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs149071226; hg19: chr5-127624905;